/* ==========================================================================
   博奥体育 · 全站共享样式  /assets/site.css
   框架式导航 + 左右分屏 + 粗野主义描边 + 等宽数字
   ========================================================================== */

:root {
  /* 色彩 */
  --ink-950: #060B16;
  --ink-850: #0C1526;
  --ink-700: #131F35;
  --ink-500: #26374F;
  --cyan-400: #33E1F2;
  --cyan-200: #9FEEF7;
  --orange-500: #FF7A1A;
  --orange-200: #FFC48C;
  --warm-50: #F5F2EA;
  --gray-400: #8C9AAC;

  /* 字体 */
  --font-head: "Barlow Condensed", "Oswald", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 字号 */
  --fs-display: clamp(40px, 7vw, 96px);
  --fs-h1: clamp(32px, 4.6vw, 64px);
  --fs-h2: clamp(24px, 3vw, 38px);
  --fs-h3: 20px;
  --fs-body: 17px;
  --fs-small: 14px;
  --fs-label: 12px;
  --fs-mono-xl: clamp(28px, 4vw, 56px);

  /* 结构 */
  --bar-h: 68px;
  --rail-w: 268px;
  --gutter: clamp(16px, 3vw, 40px);
  --radius: 4px;
  --shadow-hard: 6px 6px 0 #02060E;
  --shadow-hard-sm: 4px 4px 0 #02060E;
}

/* --------------------------------------------------------------- reset -- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-top: var(--bar-h);
  background-color: var(--ink-950);
  background-image:
    repeating-linear-gradient(0deg, rgba(38, 55, 79, 0.30) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(38, 55, 79, 0.14) 0 1px, transparent 1px 72px);
  background-attachment: fixed;
  color: var(--warm-50);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; height: auto; }

button, input, select, textarea { font: inherit; color: inherit; }

ul, ol { margin: 0 0 1em; padding-left: 1.15em; }

a { color: var(--cyan-400); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--cyan-200); }

:focus-visible {
  outline: 3px solid var(--cyan-400);
  outline-offset: 3px;
}

::selection { background: var(--orange-500); color: var(--ink-950); }

/* ------------------------------------------------------------ 中文排版 -- */
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.01em;
  margin: 0 0 0.55em;
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); line-height: 1.25; }
h4 { font-size: var(--fs-body); line-height: 1.3; }
p { margin: 0 0 1.1em; }
p:last-child, ul:last-child, ol:last-child { margin-bottom: 0; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* -------------------------------------------------------------- 跳转链 -- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--orange-500);
  color: var(--ink-950);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: var(--radius);
  transform: translateY(-180%);
  transition: transform 0.18s ease-out;
}
.skip-link:focus { transform: translateY(0); color: var(--ink-950); }

/* ==================================================================== 头部 */
.site-header { position: relative; z-index: 60; }

.frame-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--bar-h);
  background: var(--ink-950);
  border-bottom: 2px solid var(--ink-500);
  z-index: 60;
}

.frame-bar__inner {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  padding: 0 var(--gutter);
}

.frame-bar__progress {
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-400), var(--orange-500));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

/* 品牌 ---------------------------------------------------------------- */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: inherit;
  text-decoration: none;
}
.brand:hover { color: inherit; }

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 2px solid var(--cyan-400);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(51, 225, 242, 0.20), rgba(51, 225, 242, 0));
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
}

.brand__text { display: flex; flex-direction: column; line-height: 1.15; }

.brand__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--warm-50);
}

.brand__sub {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gray-400);
}

/* 状态条 -------------------------------------------------------------- */
.status-chip {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 0 auto;
  padding: 6px 12px;
  border: 1px solid var(--ink-500);
  border-radius: var(--radius);
  background: var(--ink-850);
  font-size: var(--fs-label);
  letter-spacing: 0.10em;
  color: var(--gray-400);
  white-space: nowrap;
}

.status-chip__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(51, 225, 242, 0.18);
  flex: 0 0 auto;
}

.status-chip__key { color: var(--ink-500); text-transform: uppercase; }
.status-chip__value { color: var(--warm-50); font-size: var(--fs-label); }
.status-chip__time { color: var(--orange-500); font-size: var(--fs-label); font-weight: 700; }

.frame-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* 移动开关 ------------------------------------------------------------ */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  background: var(--ink-850);
  border: 2px solid var(--ink-500);
  border-radius: var(--radius);
  color: var(--warm-50);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color 0.16s ease, color 0.16s ease;
}
.nav-toggle:hover { border-color: var(--cyan-400); color: var(--cyan-400); }
.nav-toggle[aria-expanded="true"] { border-color: var(--cyan-400); color: var(--cyan-400); background: rgba(51, 225, 242, 0.08); }

.nav-toggle__bars {
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 5px 0 currentColor, 0 -5px 0 currentColor;
}

.nav-toggle__text { line-height: 1; }

/* 左侧竖向轨道 -------------------------------------------------------- */
.frame-rail {
  position: fixed;
  top: var(--bar-h);
  left: 0;
  bottom: 0;
  z-index: 55;
  width: min(84vw, 320px);
  display: flex;
  flex-direction: column;
  padding: 20px 0 18px;
  background: var(--ink-950);
  border-right: 2px solid var(--ink-500);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(-100%);
  transition: transform 0.28s ease-out;
}
.frame-rail[data-open="true"] { transform: translateX(0); }

.rail__label {
  margin: 0 0 14px;
  padding: 0 20px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-500);
}

.rail-nav { flex: 0 0 auto; }

.rail-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.rail-nav__item { margin: 0; }

.rail-nav__link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 20px;
  border-left: 3px solid transparent;
  color: var(--gray-400);
  text-decoration: none;
  transition: color 0.16s ease, background-color 0.16s ease, border-color 0.16s ease;
}
.rail-nav__link:hover {
  color: var(--warm-50);
  background: var(--ink-850);
  border-left-color: var(--ink-500);
}
.rail-nav__link[aria-current="page"] {
  color: var(--warm-50);
  background: var(--ink-850);
  border-left-color: var(--cyan-400);
}
.rail-nav__link[aria-current="page"] .rail-nav__idx { color: var(--cyan-400); }

.rail-nav__idx {
  flex: 0 0 auto;
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-500);
}

.rail-nav__text {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.rail__foot {
  margin-top: auto;
  padding: 18px 20px 0;
  border-top: 1px solid var(--ink-500);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rail-top {
  width: 100%;
  padding: 9px 12px;
  background: transparent;
  border: 1px solid var(--ink-500);
  border-radius: var(--radius);
  color: var(--gray-400);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.rail-top:hover { color: var(--cyan-400); border-color: var(--cyan-400); }

/* ==================================================================== 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.btn--primary {
  background: var(--orange-500);
  border-color: var(--orange-500);
  color: var(--ink-950);
  box-shadow: var(--shadow-hard-sm);
}
.btn--primary:hover { background: var(--orange-200); border-color: var(--orange-200); color: var(--ink-950); }

.btn--ghost {
  background: transparent;
  border-color: var(--ink-500);
  color: var(--cyan-400);
}
.btn--ghost:hover { border-color: var(--cyan-400); background: rgba(51, 225, 242, 0.08); }

.btn--quiet {
  background: var(--ink-850);
  border-color: var(--ink-500);
  color: var(--warm-50);
}
.btn--quiet:hover { border-color: var(--cyan-400); color: var(--cyan-400); }

.btn--full { width: 100%; }

.copy-btn {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: var(--ink-850);
  border: 1px solid var(--ink-500);
  border-radius: var(--radius);
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  line-height: 1.6;
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}
.copy-btn:hover { border-color: var(--cyan-400); }
.copy-btn[data-copied="true"] {
  background: var(--orange-500);
  border-color: var(--orange-500);
  color: var(--ink-950);
}

/* ================================================================== 页脚 */
.site-footer {
  margin-top: clamp(48px, 8vw, 100px);
  border-top: 2px solid var(--ink-500);
  background: linear-gradient(180deg, var(--ink-850), var(--ink-950) 62%);
  padding: clamp(32px, 5vw, 64px) var(--gutter) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--ink-500);
}

.footer-brand { display: flex; flex-direction: column; gap: 14px; }

.footer-brand__note {
  margin: 0;
  max-width: 30em;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--gray-400);
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.footer-col__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col__link {
  color: var(--gray-400);
  font-size: var(--fs-small);
  text-decoration: none;
  transition: color 0.16s ease;
}
.footer-col__link:hover { color: var(--warm-50); text-decoration: underline; text-underline-offset: 4px; }

.footer-contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px 26px;
  padding: clamp(22px, 3vw, 32px) 0;
  border-bottom: 1px solid var(--ink-500);
}

.contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-small);
  color: var(--gray-400);
}

.contact-item__key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.20em;
  color: var(--ink-500);
}

.contact-item__value { color: var(--warm-50); word-break: break-word; }

.contact-item__link {
  font-size: var(--fs-small);
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-500);
}
.contact-item__link:hover { border-bottom-color: var(--cyan-400); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding: 18px 0 26px;
}

.footer-legal__line {
  margin: 0;
  font-size: var(--fs-label);
  color: var(--gray-400);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-links__item { margin: 0; }

.footer-links__link {
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  color: var(--gray-400);
  text-decoration: none;
}
.footer-links__link:hover { color: var(--cyan-400); }

/* ============================================================ 通用容器 */
.page-window {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.prose {
  max-width: 38em;
  font-size: var(--fs-body);
  line-height: 1.75;
}
.prose h3 { margin-top: 1.7em; margin-bottom: 0.5em; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose li { margin-bottom: 0.4em; }

.rule {
  position: relative;
  height: 1px;
  margin: 0;
  border: 0;
  background: var(--ink-500);
}
.rule::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  right: 0;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--ink-500) 0 1px, transparent 1px 10px);
  pointer-events: none;
}

.section {
  padding: clamp(40px, 6vw, 84px) 0;
}
.section + .section,
.section--ruled {
  border-top: 1px solid var(--ink-500);
}

.section__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.section__label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan-400);
}
.section__label::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan-400);
  flex: 0 0 auto;
}

.section__title { margin: 0; }

.section__lead {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  color: var(--gray-400);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.6vw, 20px);
}

.grid-2,
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 28px);
}

.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--ink-700);
  border: 2px solid var(--ink-500);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--ink-500);
}

.panel__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: var(--fs-h3);
  font-weight: 700;
}

.panel__body { font-size: 16px; color: var(--warm-50); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  background: var(--ink-850);
  border: 1px solid var(--ink-500);
  border-radius: var(--radius);
  color: var(--cyan-200);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.7;
}

.tag--accent {
  background: var(--orange-500);
  border-color: var(--orange-500);
  color: var(--ink-950);
}

/* 面包屑 -------------------------------------------------------------- */
.breadcrumb {
  padding: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gray-400);
}
.breadcrumb__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.breadcrumb__item { display: flex; align-items: center; gap: 8px; margin: 0; }
.breadcrumb__sep { color: var(--ink-500); }
.breadcrumb__link { color: var(--gray-400); text-decoration: none; }
.breadcrumb__link:hover { color: var(--cyan-400); }
.breadcrumb__current { color: var(--cyan-400); }

/* 筛选 ---------------------------------------------------------------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 0;
}

.filter-btn {
  padding: 7px 15px;
  background: var(--ink-850);
  border: 2px solid var(--ink-500);
  border-radius: var(--radius);
  color: var(--gray-400);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}
.filter-btn:hover { color: var(--warm-50); border-color: var(--cyan-400); }
.filter-btn[aria-pressed="true"] {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-950);
}

/* 图片占位容器 -------------------------------------------------------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--ink-500);
  border-radius: var(--radius);
  background-color: var(--ink-700);
  background-image:
    repeating-linear-gradient(90deg, rgba(51, 225, 242, 0.10) 0 1px, transparent 1px 14px),
    linear-gradient(155deg, var(--ink-700), var(--ink-950));
  aspect-ratio: 16 / 9;
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  margin: 0;
  padding: 8px 12px;
  background: rgba(6, 11, 22, 0.82);
  border-top: 1px solid var(--ink-500);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--gray-400);
}

/* 进场淡入 ------------------------------------------------------------ */
.reveal {
  opacity: 0;
  transition: opacity 0.24s ease-out;
}
.reveal.is-visible { opacity: 1; }

.is-hidden { display: none !important; }

/* ============================================================== 响应式 */
@media (min-width: 600px) {
  .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }

  .footer-contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-item--wide { grid-column: 1 / -1; }
}

@media (max-width: 1079px) {
  .frame-actions__cta { display: none; }
}

@media (max-width: 900px) {
  .status-chip__key { display: none; }
  .status-chip { gap: 8px; }
}

@media (max-width: 640px) {
  :root { --bar-h: 60px; }
  .brand__mark { width: 32px; height: 32px; font-size: 11px; }
  .brand__name { font-size: 17px; }
  .brand__sub { display: none; }
  .status-chip { display: none; }
  .frame-actions { margin-left: auto; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 1080px) {
  body { padding-left: var(--rail-w); }

  .frame-rail {
    width: var(--rail-w);
    transform: none;
  }

  .nav-toggle { display: none; }

  .footer-grid {
    grid-template-columns: minmax(0, 1.6fr) repeat(4, minmax(0, 1fr));
  }
  .footer-brand { grid-column: auto; }

  .footer-contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1200px) {
  .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1440px) {
  :root { --rail-w: 296px; }
}

/* 尊重减少动效 -------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal { opacity: 1 !important; }
  .frame-rail { transition: none; }
  .skip-link { transition: none; }
}